проблема с картинками фильмов (thumbnails) в гноме

Я вижу только некоторые картинки, а хотелось бы видеть картинки всех фильмов. Подозреваю, что проблема в неустановленных кодеках, но не могу найти каких. Устанавливать все подряд не очень хочется. Есть ли способ узнать Какие кодеки мне нужны?

# emerge --info

Portage 2.1.6.13 (default/linux/amd64/2008.0, gcc-4.3.2, glibc-2.9_p20081201-r2, 2.6.30-gentoo-r4 x86_64)
=================================================================
System uname: Linux-2.6.30-gentoo-r4-x86_64-AMD_Athlon-tm-_64_X2_Dual_Core_Processor_5600+-with-gentoo-1.12.11.1
Timestamp of tree: Sat, 08 Aug 2009 03:20:01 +0000
app-shells/bash:     3.2_p39
dev-java/java-config: 2.1.8-r1
dev-lang/python:     2.6.2-r1
sys-apps/baselayout: 1.12.11.1
sys-apps/sandbox:    1.6-r2
sys-devel/autoconf:  2.13, 2.63-r1
sys-devel/automake:  1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.2
sys-devel/binutils:  2.18-r3
sys-devel/gcc-config: 1.4.1
sys-devel/libtool:   1.5.26
virtual/os-headers:  2.6.27-r2
ACCEPT_KEYWORDS="amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=athlon64 -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/config /var/lib/hsqldb"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/sandbox.d /etc/splash /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c /etc/udev/rules.d"
CXXFLAGS="-march=athlon64 -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://mirror.hamakor.org.il/pub/mirrors/gentoo"
LANG="ru_RU.UTF-8"
LDFLAGS="-Wl,-O1"
LINGUAS="ru he"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://mirror.hamakor.org.il/gentoo-portage"
USE="3dnow X acl acpi aiglx alsa amd64 bluetooth branding bzip2 cairo cdr clamav cli cracklib crypt cups dbus djvu doc dri dv dvd dvdr eds encode esd fam ffmpeg fortran gdbm gif glitz gnome gnome-keyring gpm gstreamer gtk hal hddtemp iconv isdnlog java java6 jpeg ldap libnotify mad mmx mng mp3 mpeg mudflap multilib mysql nautilus ncurses nls nptl nptlonly nsplugin nvidia ogg opengl openmp pam pcre pdf perl png ppds pppd python quicktime readline reflection rss sdl session spell spl sqlite sse sse2 ssl startup-notification svg symlink sysfs tcpd theora tiff truetype unicode v4l v4l2 vorbis xcb xcomposite xml xorg xscreensaver xv xvid zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="ru he" USERLAND="GNU" VIDEO_CARDS="nvidia"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY